/**   
* @Title: ContextLoader.java
* @Package org.xaoyaoyao.spider.util
* @Description: TODO
* @author xaoyaoyao
* @date Jan 25, 2019 1:02:35 PM
* @version V1.0   
*/
package org.xaoyaoyao.spider.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @ClassName: ContextLoader
 * @Description: TODO
 * @author xaoyaoyao
 * @date Jan 25, 2019 1:02:35 PM
 * 
 */
@Component
public class ContextLoader implements ApplicationContextAware {

	private static ApplicationContext applicationContext = null;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (ContextLoader.applicationContext == null) {
			ContextLoader.applicationContext = applicationContext;
		}
	}

	// 获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	// 通过name获取 Bean.
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	// 通过class获取Bean.
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	// 通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}
}
